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Making Better Use of All Those TCP ACK Packets
White Papers Many TCP connections show an asymmetric traffic pattern where significantly more data is sent in one direction than the other resulting in large numbers of ACK-only packets to be generated. This paper proposes and evaluates two independent...
[December 20, 2007, 0:01]
Matching TCP/IP Packets to Detect Stepping-Stone Intrusion
White Papers The paper propose a conservative and a greedy matching algorithm to match TCP/IP packets in real-time. The first algorithm matches fewer packets but the quality of the matching is high. The second one matches more packets with some uncertainty on...
[December 6, 2007, 0:01]
Deep Packets: Application Layer Security Threats
White Papers Viruses can sometimes go undetected through traditional firewalls, which typically scan only the headers of packets - the envelopes - and ignore the payload. What is needed is application layer filtering software, such as Microsoft Internet...
[September 2, 2008, 7:35]
What about encrypted packets?
Talkback Do the file sharers encrypt their data over their networks? If so, will they be forced to give the keys to their ISP's? And how will they know if an MP3 is copyrighted or not, will they compare the music to a database?
[February 23, 2008, 12:39]
Vodafone adds packets to Radio Service
News Vodafone has launched a corporate Packet Radio Broadcast Service that uses the company's Packet Radio Service for simultaneous data delivery to terminals throughout the country. The system uses a dedicated two-way radio network, grafted onto the...
[September 8, 1999, 14:18]
Structured Errors in Optical Gigabit Ethernet Packets
White Papers This paper presents a study of the errors observed when an optical Gigabit Ethernet link is subject to attenuation. The paper uses a set of purpose-built tools which allows to examine the errors observed on a per-octet basis.
[July 4, 2008, 1:00]
Cisco - Access Control Lists and IP Fragments
White Papers This white paper explains the different kinds of Access Control List (ACL) entries and what happens when different kinds of packets encounter these various entries. ACLs are used to block IP packets from being forwarded by a router.
[November 5, 2004, 2:00]
Kerberos Assisted Authentication in Mobile Ad-Hoc Networks
White Papers An ad-hoc network comprises mobile nodes that cooperate with each other using wireless connections to route both data and control packets within the network. As the low transmission power of each node limits its communication range, the nodes must...
[August 13, 2007, 15:14]
A Caching Mechanism to Improve the Reliability of Multicasting in Multihop MANET
White Papers Reliable multicasting takes help of re-transmissions from the source, to recover lost packets .This imposes a huge overhead on the bandwidth-constrained ad hoc network. This paper presents a mechanism to selectively cache the packets with the...
[August 13, 2007, 15:14]
Network Monitoring for Video Quality Over IP
White Papers This paper considers the problem of predicting application-level video quality based on monitoring video packets within the network. The paper presents a framework for in-network video quality degradation monitoring, and describe the information...
[March 4, 2008, 0:02]
Enhancing Network Intrusion Detection With Integrated Sampling and Filtering
White Papers The structure of many standalone Network Intrusion Detection Systems (NIDSs) centers around a chain of analysis that begins with packets captured by a packet filter, where the filter describes the protocols (TCP/UDP port numbers) and sometimes...
[June 18, 2008, 1:01]
A New IP Traceback System Against Distributed Denial-of-Service Attacks
White Papers On most Denial-of-Service (DoS) attacks, packets with spoofed source addresses are employed in order to disguise the true origin of the attacker. A defense strategy is to trace attack packets back to their actual source in order to make the...
[June 24, 2009, 16:02]
Applying Fast String Matching to Intrusion Detection
White Papers The performance of signature-based network intrusion detection tools is dominated by the string matching of packets against many signatures. The result is a system that matches many common packets 5 times faster with an average speedup of 50%.
[May 21, 2008, 1:01]
A guide to VoIP telephony review
Reviews VoIP, or Voice over Internet Protocol, is a method of sending audio voice signals -- or, more specifically, telephone signals -- as data packets over the Internet. VoIP works by converting speech into a digital signal, compressing it and encoding...
[July 26, 2006, 9:55]
Joint Uplink and Downlink Capacity Considerations in Admission Control in Multiservice CDMA/HSDPA Systems
White Papers TCP-based data flows generate packets and ACKs in two directions, be it in the wireline or wireless networks. In the latter case, packets are typically found in the downlink whereas ACKs are in the uplink.
[December 21, 2007, 0:01]
Packet Scheduling for Video Streaming Over Wireless With Content-Aware Packet Retry Limit
White Papers Video packets of different importance are unequally protected with different retry limits at the MAC layer. More retry numbers are allocated to packets of higher loss impact to achieve unequal error protection.
[May 31, 2007, 1:00]
WhoSock
Downloads If you wish to resolve a host name and the path taken by your data packets from here to there, you can do it the hard way or the easy way. You can also ping the host to see whether it is active, and trace the route of your packets to the server and...
[September 5, 2002, 8:00]
Solve Windows 2000 DNS server problems
Talkback Try using ethereal to capture your packets (its easier than it sounds). You can make ethereal filter so that only the DNS requests are captured, so this will prevent any confusion finding the correct packets.
[February 17, 2006, 9:43]
Access Control Lists and IP Fragments
White Papers This White Paper explains the different kinds of Access Control List (ACL) entries and what happens when different kinds of packets encounter these various entries. ACLs are used to block IP packets from being forwarded by a router.
[January 9, 2004, 23:46]
TCP Dynamics in 802.11 Wireless Local Area Networks
White Papers In 802.11 wireless links with disabled MAC retries, data and ACK packets within a TCP session collide resulting in packet losses. A key contribution of this paper is the visualization of TCP dynamics to capture MAC layer collisions between DATA and...
[December 20, 2007, 0:01]
